Alfred Or the Youthful Enquirer in Which Many of the Operations of Nature An
Alfred Or the Youthful Enquirer in Which Many of the Operations of Nature An
Gideon Riegler
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" Alfred did so; and as soon as he had divided the liquor he squeezed a little lemon juice into one of the glasses, when, to his great delight, the liquor that that glass contained instantly became red. Thus he was convinced beyond all doubt, of the fact he had wished to establish, that acids will turn vegetable blues into o reds. "Now will you give me a little alkali, papa?" Mr. A. Dissolved a little soda in some water and gave it to his son. Alfred poured this into the other glass and the blu...e water imme- LITTLE EXPERIMENTS. 183 diately became green. Thus he was likewise convinced that alkali will convert vegetable blues into greens. " Paper stained with the blue colour of vegetables is called test o paper, " said Mr. A. " this may be changed by the least powerful of the acids or alkalies, and I will therefore give you some that you may amuse yourself with making little expe- riments upon it. " Besides the numerous acids obtained from vegetables, " continued he, " there are three, much stronger than any we have hitherto mentioned, called, by way of distinction, fossil acids : they are, the vitriolic, the muriatic, and the nitric acids, the last of which will dissolve silver.
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